UITableView 滚动时重复单元格

当我向下滚动 UITableView 时，它开始向我显示我已经看到的相同单元格，并且稍微滚动一下继续将单元格放在错误的位置。

这是我正在使用的代码。如果需要任何其他信息，请告诉我：

.h

@interface HomeViewController : UITableViewController {


    int numberOfRows;

    NSArray *allVaults;

}

@property (nonatomic, assign) int numberOfRows;
@property (nonatomic, retain) NSArray *allVaults;

@end

.m

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
NSString *vaultsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Vaults"];
    NSFileManager *fileManager = [NSFileManager defaultManager];
    self.allVaults = [fileManager contentsOfDirectoryAtPath:vaultsPath error:nil];

numberOfRows = [self.allVaults count];
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return numberOfRows;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];


        NSString *vaultsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Vaults"];

        NSString *dictionaryPath = [NSString stringWithFormat:@"%@/%@",
                                    vaultsPath,
                                    [self.allVaults objectAtIndex:indexPath.row]];

    NSDictionary *dictionary = [NSDictionary dictionaryWithContentsOfFile:dictionaryPath];

        cell.backgroundView = [AHCellCreation backgroundView];
        cell.selectionStyle = UITableViewCellSelectionStyleGray;
        cell.selectedBackgroundView = [AHCellCreation selectedBackgroundView];
    cell = [AHCellCreation createCellWithDictionary:dictionary Cell:cell];
    }
    return cell;
}

任何帮助表示赞赏！

编辑 1：图像显示当我将大多数代码移到 (cell == nil) if 语句之外时会发生什么：

Before:

After:

EDIT 2:

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    return 82;
}

看起来好像您只是在返回零时才设置单元格内容带标识符的出队可重用单元格。您每次都需要设置单元格内容，而不仅仅是在需要创建新单元格时。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";

    AHCell *cell = (AHCell*) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        // create a new cell if there isn't one available to recycle
        // cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
        cell = [AHCell blankCell];

    }

    // set the contents of the cell (whether it's a new one OR a recycled one)
    NSString *vaultsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Vaults"];

    NSString *dictionaryPath = [NSString stringWithFormat:@"%@/%@",
                                vaultsPath,
                                [self.allVaults objectAtIndex:indexPath.row]];

    NSDictionary *dictionary = [NSDictionary dictionaryWithContentsOfFile:dictionaryPath];

    cell.backgroundView = [AHCellCreation backgroundView];
    cell.selectionStyle = UITableViewCellSelectionStyleGray;
    cell.selectedBackgroundView = [AHCellCreation selectedBackgroundView];
    // cell = [AHCellCreation createCellWithDictionary:dictionary Cell:cell];
    [cell populateAHCellWithDictionary: dictionary];
    return cell;
    }

Update更新了代码以解决第二个问题。重新设计 AHCell 以便类方法，例如空白单元格返回一个新单元格，其中设置了子视图和实例方法，例如用字典填充AHCell：设置内容。